The Sun Has Cracked, and I'm Trapped in the Supernatural?

Lin Zhijie, an ordinary high school student, is out buying breakfast one morning when he unexpectedly witnesses something impossible: the sun splits down the middle, as if torn apart by an unseen force. His classmate Chen Yu sees it too. At first, they think it’s just a shared hallucination. Then, not long afterward, the same fractured sky appears during a schoolwide assembly, and panic spreads in an instant. What they saw wasn’t an illusion. The world really has changed. But more terrifying than the change itself are the rules. At some point, bizarre rules for survival begin appearing all over the school: 【Rule One: You must enter your classroom before the morning study bell rings, or you will be “purged.”】 【Rule Two: During lunch break, do not look directly at the sun in the sky.】 【Rule Three: After evening study ends, do not take the stairs, do not use the elevator, and do not look back.】 【Rule Four: If someone around you starts acting strangely, report it to your homeroom teacher immediately, but do not believe the teacher’s response.】 … With their familiar school transformed into a nightmare of deadly rules, Lin Zhijie and Chen Yu must find a way to survive by searching for loopholes. But there’s one problem: are these rules really all true?